21053487

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{479}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 15718353

約数列:

[1, 3, 7, 13, 21, 23, 39, 49, 69, 91, 147, 161, 273, 299, 479, 483, 637, 897, 1127, 1437, 1911, 2093, 3353, 3381, 6227, 6279, 10059, 11017, 14651, 18681, 23471, 33051, 43589, 43953, 70413, 77119, 130767, 143221, 231357, 305123, 429663, 539833, 915369, 1002547, 1619499, 3007641, 7017829, 21053487]

約数ペア:

[(1, 21053487), (3, 7017829), (7, 3007641), (13, 1619499), (21, 1002547), (23, 915369), (39, 539833), (49, 429663), (69, 305123), (91, 231357), (147, 143221), (161, 130767), (273, 77119), (299, 70413), (479, 43953), (483, 43589), (637, 33051), (897, 23471), (1127, 18681), (1437, 14651), (1911, 11017), (2093, 10059), (3353, 6279), (3381, 6227)]